Burnishing-machine.



G. F. STAOKPOLE. BURNISHING MACHINE. APPLICATION ILBD D Patented Oct.15, 1912.`

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o. P. STAGKPOLB.

` BURNISHING MACHINE.

APPLICATION FILEI) DEG.19, 1911.

w w 3M 6. wf. 0,. ak 1 WG CHARLES F. STACKBOLE, OF LYNN, MASSACHUSETTS,ASSIGNOR OF ONE-HALE T i ALFRED H. yHKIWVAIMIJ1 OF BOSTON,MASSACHUSETTS.

Loiaeaa.

'To all whom tt 'may concem:

" Be it known, that I, CHAHES F' STAGE' i Porn, a citizen of the UnitedStates, residing i 'at Lynn, in

the county of. Essex, State of Massachusetts, have mvented a certaintnew'and useful Improvement in Burnishing- `f Machines, of which thefollowing' is a speciv ification, ,reference being had therein to theaccompanying drawmgs.

The invention comprises improvements in actuating devices forreciprocatory tools, more particularly the tools employed inedge-burnishing machines used i'n the manu- :facture of boots and shoes.Also, in means of heating such tools.

General' objects of the invention are to provide actuatng means ofsimplified character and construction; to obviate liability to spottingor staining the work with lubricat-ing oil; 'to enable a high speed ofmovement of a tooll to be attainedv without no- 'ticeable jar orvibration, to provide for the I hea-ting of the tool without the use offlame `thereto embodiments of the features o ing nut being broken away.Fig. 4: is a frontelevation on the same order as Fig. 1, but showinga'diiferent form of cam for actuating the tool, the collar and lock-nutbeing removed from the adjusting-screw for the spring-mounting of thetool-carrying arm, Fig.` 5 is a detail view showing a third form of cam.Fig." 6 is a view similar to Fig. l but showing a different mode ofsupporting the tool-carrier, and a different meansof applyingspring-tension, the upper end of the spindle of the tool-stock beingbroken away. Fig. 7 is a side e'levation of the parts which|` are shownin Fig. o. Fig. 8 is a front elevatioii of a construction in which thecam works within a yoke in connection with the tool-carryingarm. Fig. 9

's a detail view illustrating a sim lified construction in which thetool or its stock is' directly engaged by the cam. Fig. 10 is aspecification of Letters Patent. Application filed December 19, 1911. iSerial No. 666,656.`

' general contour detail view of the Working end of the tool of Fig. 9.i

Having reference to" the drawings,-in each of the main views the head ofthe sup- 'porting frame of a bnrnishing machine is shown at 1, and 2 isa rotary shaft which is mounted in the said head in bearings applied tothe latter, one of the said bearigs being partly shown at 3. Only' theforwardly-projecting end-portion of the shaft is represented. Thisend-portion is operatively combined with the tool-carrying arm 4, forthe purpose of occasioning reciprocatory movement thereof, as isexplained hereinafter in dealing with the features of the invention. Thetool-carrying arm may be constructed and equipped to carry a single tool5, as in some instances in practice, or a plurality of tools, as also,common. It is shown provided with a shifting tool-stock 7 havingtwoprojecting pins 7a, 7 a, on which two tools 5, 5, 'are mounted. Thesaid toolstock 7 is mounted rotatably upon the arm 4 in well-knownnianner providing for enabling either of the said tools to be shiftedinto workingl position, and the tools have sockets receiving andfit-ting said pins with capacity to turn slightly thereon under therestraint of latching Springs 7, 7b, as usual,

excepting that by preference the sockets are somewhat longer thanordinarily in practice. X is a Worlrrest located in convenient positionbelow the tool-carrier and tools, it

being shaped to constitute a finger-hold, as

usual.

Referring now more particularly to the parts more immediately involvediii the iiivention-the rotary shaft 2 is operatively combined with thetool-carrying ai'm i by means of a cain or its equivalent in connectionwith said shaft, acting upon the said arm. The construction of the camand arm, and, the mannei' 'of mounting the arm, may vary. In Figs. 1 and2 the cam 6 is coiistituted by a' simple eccentric; in Figs. 4, 6 and 7the cam (ia is a. two-thi'ow elliptical 5 the cain 6b' is a three-throwtriangular cam. The pi'ecise Shape in crosssection of the cam is notmaterial, but the should be rounded and free fromsharp or Sudden changesin dircctioii. In the said figures (1 to 7 inclusive) a surface LP uponor in connectioii witli the toolcarrying arm is maintained in contactwith the cam by spring-tension actmg in conneccam; in Fig.

Patentefioeaiaieie.

. tension eifecting the return of theA arm andv A45 cam. The sald springyields transversely 55 In connection vwith 'the cam 6 and the arm 65shell in Figs. 1 and 2 is circular in cross-v section to fit the cam 6of such figures. The shells 10R of Figs. 4, 6 and 7 are elliptical tofit the elliptical cams 6a, 6a, of such figures, and the shell 10b ofFig. 5 is triangular to fit tion with the said arm, the outstandingeccentric or projecting prominence or prominences of the cam act-ing topush the arm and tool in one direction and the springtool in the reversedirection. The means and manner of applying 'the spring-tension mayVary.

Figs. 1, 2 and 4 show a novel means of 10 supporting the' tooi-carryingarm and at the same time securing 'the desired'spring-tension inconnection with the same to insure proper co-action with the cam. In thesaid figures the arm 4'is attached by bolts w, w, to one side of adownwardly-projecti'ng extension or lug 8a constituting one extremity ofa C-spring 8 of circular curvature, the said spring having its oppositeextremity constituted by a second extension or lug .8b projectingoutwardly in a horizontal direction. The extension or lug 8b is madefast by a bolt w' to the under side of a forwardlyprojecting portion 9of a plate 9' which is bolted upon the top of head l. Thereby the springis supported upon' the machine-head, so that in turn it supports the arm4. The longitudinal axis of the arm 4 and the tool 5, and that of theextension or lug 8b, are in planes which are radial or approximately sowith respect to the center of the C-spring. Such planes in this instanceare atrright angles with each other. To permit adjustment of thetool-carrying arm bodily toward and from the center of shaft 2, the hole:v2 made through extension or lug 8b of sprin mounting 8 for thereception of bolt is in the form of an elongated slot. A nut m8 upon thethreaded stem'of bolt cc' above the support 9 serves' in conjunctionwith the bolt, 40 when turned down upon the latter, to clamp t e,spring-mounting in the position. into which it has been adjusted. Thetension of the C-spring operates to hold the surface 4a ofthetool-'car'rying arm in contact with the employmentpf vulcanizedfiber, or of other antl-attrition material' in conjunction With the camIor it'sfequivalent and the tool-carrying arm 4 renders unnecessary ltheuse of oil is, therefore, no liability of injury to the work b spottingor-staining from flying or spattering oil.: Such spotting or staining isvery common in the case of machines at present in use employin for theactuation of the, tool-carrier a cran and a connectingrod with splitboxes or bearings. The em-' ployment of the C-spring as a mounting andsupport for the arm 4 in the general construction shown in Figs. 1, 2and 4, dispenses with all pivotal supporting bearings in connection withsuch arm, and still 'further eliminates the occasion for the use oflubricating oil in proximity to the work, and the liability of spottingor staining of the latter. i Z

The cam is r'otated at a high rate of speed in practice.v In consequenceof the contact of its shell of vulcanized fiber with the| metallicsurface 4*11 'of the arm 4 at such high rate of speed, a considerableamount of heat is genei'atedyand such heat is transmitted to the tool ortools '5, heating the same properly or the desired results inburnishing. To ,enable'the degree of heat which is imparted to the tool'to be regula'ted, provision is made for varying at will thespring-ten'sionwhich bears the surface 4a against the cam, andconsequently the pressure between such surface and that of the cam.Tot-his end, in Figs. 1, 2 and 4 the C-spring is made adjustable uponits support 9, as explained hereinabove, so that surface '4*' of the arm4 may betcaused to press with greater or less force, as may be required,against the cam. For convenience in .making the adjustment, and in orderthat the heating action may be r` gu lated to a nicety, I have combinedadjustingscrew devices with the spring-mounting 8. The character' and'construction of such devices may 'vary in practice In Figs. 1, 2, 3, 4,an upturned ear 8 of' extension or lug 8b of the spring-Inountin' has ascrew-threaded hole tapped horizonta ly therethrough, such as the saidcam operates to push the said arm and tool forward. It yields verticallyto the upthrust of the work presented by the operative beneath the lowerend of the 50 tool which-is in action, vand operates to cause the tooltov act with yielding down-pressure upon the work. In operation, 'thetool-carrying arm vibrates about 'a point located centrally of theC-spring, or nearly'so.

ed stem of an adj'ustin v-.screw 11, the inner' end' of which makeslcontact withpone side of support 9. Upon this screw, outside the car 8,is mounted a collar 12-'having` a 4 I provide a surfacing ofanti-attrition` material which receives the actual contact and pressurebetweenthe -cam and arm. This surfacing preferably, thou h notnecessarily 60 in all cases, is composed o vulcani'zed fiber. I haveshown the same a p'liedltov the cam by fitting a sleeve-like shelil 'orjackt off'the anti-attrition material to the' cam, such shellsurrounding the periphery of the cam. The

the'collar by hand; The said collarrhas a' radial threaded hole whichis'occupied by a the reduced" inner end of which enters a groove 11',Fig. v 3, formed inthe ad- Ijusting-screw 11 w nd extending lengthwiselthe'triangular cam 6b of such .figure The 70 or the like as lubricantbetween them. There 75 hole :having screwed into the same thethreadknurled flange for convenience in 'rotating 1'25-v ananasaof thelatter. By turning the collar t-he screw is turned within the threadedhole in the upturned ear 8 of the extension or lug 8b, so that the innerend of the screw shall project more or less from the ear toward the'spring-mounting and arm have been adjusted, to hold them in therequired position. At 18 is a lock-nut upon the outer poi'tion of screw11, such lock-nut serving to clamp the collar l2-against the outersurface of e'ar 8c to prevent accidental loss of adjustmentof the screwand the spring-Inounting and' arm.

At 4x, Figs. 1 and 4, is a layer 'of fashestos or other heatnon-conducting material, interposed between tool-carrying arm 4 and theextension or 111g SVa of the spring-mounting, to obviate thetransmission of' heat to the said spring. A similarlayer ly is or may beapplied between plate 9' and thetop of head 1 of the machine to deadenthe sound. Figs. 6 and 7 show a different form of mounting for thetool-carrying arm, and a different means of producing the springtensionand regulating the latter. In these figures the tool-carrying arm t ishung-a't its upper end by means of a pivot 15 to a horizontallyeXtendingarm 16. The arm 16 in its turn is hung by a pivot 17 to an uprightportion 9a of the top-plate 9'. The horizontal arm 1G andptool-carrying' arm are afforded Vertical support by means of a nut 18upon a screw-threaded stem 19 set in a portion of plate 9 and risingthcrefrom. Said stem passes through a hole in the arm 16. The latterrests upon the Vnut- 18, below which is a lock-nut 18aL upon the stem.By

turning lthe nuts up-or down, the arm may be adjusted to occupy normallya higher or lower position as required. The stemlis surrounded above thehorizontal arm 16 by an 'f expanding spring composed of a block ofrubber 20, which is confined between the top of the arm and a washer 21held in place by an adjustable nut 22 and locknut 23 upon the topportion of the stem 19. The spring 'g 20 yieldsislightly to accommodatethe upthrust from the work which is pressedaup Ward by the operativeagainst the vworking end of the tool. The spring-tensionl whichmaintains the surface 4? of the tool-carrying` arm pressed against theactuating cam is applied by means of a leaf-spring 24 haying 'one endthereof engaged witha support upon the fixed framework, and the otherend thereof arranged to act in connection with the tool-oarrying arm 4.With the latter end is composed a small leather block 25,

which. is interposed between the spring and p the arm L1 to take thewear due to relative lengthwise movement of the arm and spring as theyswing back and' forth together, and in addit-ion obviate noise. Theupper end of the spring 24 is fastened by a screw 26 to a small block 27that is mounted by means of a transverse pivot 28 upon small uprights 29rising from the top-plate 9.` An adjustingscrew 30 has its threadedsteni fittedl to a threaded hole that is tapped through the base-portionof the said nprights, and its inner end engages the leaf-spring 24. Byturning the said adjust-ing-screw 30 the tension of spring 24 is varied,andthereby the degree of force with which the surface 1a of thetool-carrying arm is pressed against the cam is regulated. A lock-nut 311s applied to 'the adjusting-screw 30, the said lock-nut making contactwith the outer surface of the said base-portion of uprights 29.

i Fig. 8 shows a construction in which an eccentric-shaped cam GC andshell 10c similar in form to the cam 6 and shell 10 of Figs. l and 2,and acting at one side thereof against a surface 4:*1 of thetool-carrying arm 11, act at the other side against one surface of aplate or strip 11 supported by posts 4G, 11, projecting from the arm a.T he plate or strip 11 is held to the said posts by means of screws 4d,4d. These 'scre'ws may be turned to adjust the closeness of fit of thesurface 4a and plate or strip| Z.tlfagainst the opposite sides of thee'ecen't'ic-cam. In this construction the 'Cain acts positively ineffecting the return-movement ofthe tool-carryinrrv arm, and byadjustment of thescrews 4d, 4d, wear and resulting play of therelatiVely-moving surfaces may be taken uptand the heatingaction may beregulated. The eXtent, Vertically, of the space inside the yoke withinwhich the eecent'ric-cam works permits the desired Vertical yieldingaction of the toolcarry'ing arm and tool during the operationofburnishing the edge of a shoe-sole.

Fig. 9 shows a construction in which the tool, 5a, is integral with astock 5b, which is rigidly attached by bolts 03, 08, to the extension orlug 8a of the C-spring mounting 8, and a rotating cam 6 with itsanti-attrition surfacing 10 engages directly with the said tool-stock toactuate and heatl the tool. The form of the said tool is illustrated inAFigs. 9 and10. WY

I claim as my inventio'n':

1. In a burnishing machine, in combinavtion7 an actuating cam, and atool-carrier maintained in lmmediate engageinent with the said cam byspring tension, said cam producing the movement of the tool-carrier inone direction and the spring tension pro-.

ducing the movement in the other direction,

`the moving' contact between the cam and a surface in connection withthe tool-carrier imparting the heat required for .the burnishing actionof the tool.

2. In a brnishing machine, in combination, a tool-carrier,fa rotatingcamactuating said tool-carrier, and anti-attrition surfacing dispensingwith the use of oil between the said parts and also efl'ecting theheating of the tool for the burnishing action through moving contactbetween the said surfacing and the surface contacting therewith.

In a burnishing machine, in combination, a tool-carrier, and a rotatingcam-surface of anti-attrition material operatively engaging with saidtool-carrier to actuate the same, and efliecting the heating of the toolfor the burnishing action through the movement of such cam-surfacerelative to the surface which contacts therewith.

4. In a burnishing machine, in combination, a tool-carrier, a rotatingcam-body for actuating said tool-carrier, and an anti-at- I trit-ionshell or jacket upon said cam-body engaging with a surface in connectionwith said tool-carrier, and efliecting the heating of the tool-carrierand tool for the burnishing action through moving contact between I saidshell or jacket and a surface in connection With the tool-carrier.

5. In a burnishing machine, in combination, 'a tool, a tool-carrier, arotating cam eng'aging said tool-carrier, and a spring m'aintai'ning thetool-carrier in continuous engagement with said cam, said cam and springimparting reciprocatory movement to said. tool-'carrier and alsoimparting the heat required for the-burnishing action to the tool in'consequence of the moving contact of the cam-surfacewith thetool-carrier. 6. .In a burnishing machine, in combination, a tool, atool-carrier, a rotating cam imparting reciprocatory movement 'to thetool-carrier and also imparting the heat required for the burnishingaction to the tool in consequence of the moving contact of thecam'-surface with the surface engaged thereby, and means for varying thesaid eating action.

'7. In a burnishing machine, a rotating cam, a tool-carrier, and meansin connection with said tool-carrier for permitting the lattion, arotating cam, and a sprmg-held tool- :held by sprlng-tension incontinuous engagement with the said cam.

=tion, a rotating cam, a tool, a tool-carrier, ,means in connection withsaid tool-carrier :for permitting the latter to yield vertical'ly vandalso for holding it with spring-tension in contact with said cam,whereby the toolfcarrier and tool are reciprocated and heat is impartedto the tool, and means for adjustling the spring-tension to regulate theheat- 'ing actio v 10. In a burnishing machine, in combina- ;tion, arotating cam, a tool-carrier, and a spring-mounting for saidtool-carriersup.. iporting the latter and also holding 'it elasticallyin engagement with said cam. 11. In a burnishing machine, incombination, a rotating cam, a tool-carrier, a springmounting for said.tool-carrier holdinl'g it bv spring-tension in engagement wit cam, .andmeans for adjustingthe springmounting to vary the heating action of thecam. z

12. Ina burnishing machine, in combination, a rotating cam, atool-carrier eng'aged by'said cam,l and a C- spring mounting for saidtool-carrier supporting the latter' and maintainin it in contact wlth'the ca'm.` I

13. In a urnishing machine, in I,o onbinae tion, a rotating cam, a tool,a tool-carrier engaged by said cam, a C-springmoulnting for saidtool-carrier, and means to zadjut the said mounting to vary the pressurebetween the tool-carrier and cam and thereby regulate the heating of thetool.

m presence of two witnesses.

'CHARLES F. STACKPOLE.` Witnesses:

` NATHAN B. DAY,

CHAs. RANDALL.

Gopies of this patent may be obtained for flve eents each, by addressingthe Commissioner 'of Patents.

Washington, 0.

9. In a 'burnishing machine, in combinacarrier adapted to yieldvertically and also In testimony whereof I aflix my signature.

